Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

URECPE (vector, 2S)

Test 1: uops

Code:

  urecpe v0.2s, v0.2s
  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.001

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000
1004303310011100010003769410001000100011000

Test 2: Latency 1->2

Code:

  urecpe v0.2s, v0.2s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0033

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1020430033101011011000010010000300379694101002001000620010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100
1020430033101011011000010010000300379694101002001000420010004110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
10024300331002121100002010000703796941002020100062010006111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000693798501003820100332010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010
10024300331002121100002010000703796941002020100002010000111000010

Test 3: throughput

Count: 8

Code:

  urecpe v0.2s, v8.2s
  urecpe v1.2s, v8.2s
  urecpe v2.2s, v8.2s
  urecpe v3.2s, v8.2s
  urecpe v4.2s, v8.2s
  urecpe v5.2s, v8.2s
  urecpe v6.2s, v8.2s
  urecpe v7.2s, v8.2s
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0004

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)schedule ldst uop (55)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80205800708011910180018010080023300320005801012008000820080068180000100
8500192649842402581800691590242180066300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100
80204800358010110180000010080001300320005801012008000820080008180000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 1.0004

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
8002480050800212180000208000270320000800202080000200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320092800442080036200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320092800442080036200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320000800202080000200800001108000010
8002480035800212180000208000070320000800202080000200800401108000010